28 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXIII. 



do Sul. Pectorals reaching to ventrals: vcMitrals to near anal; anal 

 basis convex; adipose well developed. 



A longitudinal oval humeral spot, ?u>f surrounded by a light area; 

 caudal spot contiiuied to end of middle Vdys. 



Astyanax abramis ( Jenyns). 



Nos. h}'2i and 162j}. Two specimens, Paraguay, collected l)y Page. 

 Astyanax stilbe ( Cope ) . 



No. 84589 (})art). kSeveral specimens, probal)ly froui Para, presented 

 by J. C. Brevoort. 



Astyanax atratoensis Eig-enmann, new species. 



Ti/jM'. — Cat. Mo. 1()59, II.S.X.M. Specimen 105 mm. long over all, 

 Truando, Colombia, Michler and Schott, collectors. 



Cotype.'i. — Fouv specimens, respectively 100, 75, 68, and ()8 mm, to 

 base of caudal. The longest specimen was probably over 120 mm. in 



Fui. 5.— Astyanax atratoensis. 



total length. All from Truando, Colombia. Very closely related to 

 its neighbor in the Cauca, AKfijana,!' caucanus Steindachnei". 



It differs from it in the general shape, scales, and the presence of a 

 maxillary tooth. D. I, 10 or 11; A. ?>S or ?>9; scales 8 or 9-36 to 40-10 

 or 11 to anal, 8 or 9 to the ventrals; depth 2-2.2; head 8.66-4; eye 

 2.8-3 in head, snout -4; interorbital 2.66. 



Much compressed, the postventral surface trenchant; subrhomboidal, 

 the dorsal profile being e(iually arched with the ventral, the anal basis 

 being nearly parallel with the predorsal profile; profile slightly con- 

 cave over the eye, nape not sharply convex as in Tetragonopterus. 



Interorbital distinctly convex, the fontanel extending to over the 

 anterior border of the eye; cheeks entirely covered; mouth moderate, 

 the slender maxillary not extending much, if any, be3^ond origin of 

 eye; premaxillary with four teeth in the outer row and five in the 



